In the Soup: A Case Study to Identify Contributors to Filling Variability

Abstract

The use of a planned experiment in a plant process which is controlled using Shewhart control charts is discussed. The response is the filling variation among packets of dry soup mix. It was desired to minimize this variation to provide more product uniformity and increase consumer acceptance. The experimental design is discussed as are summary statistics derived from control chart data and the analysis and interpretation of these summary statistics. The results are analyzed graphically, without the use of formal statistical tests. They illustrate the power of planned experimentation in identifying opportunities for quality and productivity improvement.

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